"David was offered the opportunity to continue his work with us but has declined the invitation. He has decided to leave his role with his close friend, Roberto Mancini," read a statement on the club's official website. "David has made a significant contribution to the club's success since joining in 2010 and we wish him well with his career, wherever that now takes him."

Brian Kidd took charge of City's Premier League trip to relegated Reading on Tuesday following the sacking of Mancini and he will see out the season in addition to the club's two friendlies against Chelsea in the United States later this month.